package org.cwnuit.course.util;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * 权限过滤器
 * @author john
 */
public class SesurityFilter implements Filter {

	public void destroy() {
		// TODO Auto-generated method stub

	}

	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		
		HttpServletRequest req = (HttpServletRequest)request;
		HttpServletResponse res= (HttpServletResponse)response;
		HttpSession session = req.getSession();
		if(session.getAttribute("manager")!= null) {
			chain.doFilter(request, response);
		}else{
			session.setAttribute("msg", "对不起！您还没有登录！");
			res.sendRedirect(req.getContextPath()+"/index.jsp");
		}


	}

	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub

	}

}
